Jane Thomas, IAN, University of Maryland Center for Environmental Science

Baltimore's Patapsco wastewater treatment plant, seen from above, is one of nine major facilities in Maryland operating without any numeric limits on nitrogen discharges, report says.

Baltimore's Patapsco wastewater treatment plant, seen from above, is one of nine major facilities in Maryland operating without any numeric limits on nitrogen discharges, report says. (Jane Thomas, IAN, University of Maryland Center for Environmental Science)

Baltimore's Patapsco wastewater treatment plant, seen from above, is one of nine major facilities in Maryland operating without any numeric limits on nitrogen discharges, report says.Jane Thomas, IAN, University of Maryland Center for Environmental Science